CN1653722A - Diversity receiver and receiving method - Google Patents
Diversity receiver and receiving method Download PDFInfo
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- CN1653722A CN1653722A CNA03811349XA CN03811349A CN1653722A CN 1653722 A CN1653722 A CN 1653722A CN A03811349X A CNA03811349X A CN A03811349XA CN 03811349 A CN03811349 A CN 03811349A CN 1653722 A CN1653722 A CN 1653722A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
Abstract
The diversity receiver according to the present invention operates as a multicarrier diversity receiver. The diversity receiver includes weight calculators that calculate a weight coefficient for each carrier based on information about a phase difference between branches and amplitude information on each carrier obtained from a reception frame, and branch combiners that combine reception signals at branches for each carrier based on the weight coefficient prior to signal detection.
Description
Technical field
The present invention relates to multicarrier with diversity receiver and method of reseptance thereof, relate in particular to used diversity receiver and method of reseptance thereof in the digital wireless communication equipment such as digital mobile body communication, digital communication by satellite, the satellite communication of digital mobile body.
Background technology
Below traditional diversity receiver is explained.In the digital mobile body communication, electric wave takes place sometimes produce reflection, diffraction and scattering because of the landform and the atural object of travelling carriage periphery, thereby cause the amplitude and this fade-out of phase place drastic change of received signal.As being intended to one of technology of improving the characteristic under the fading environment, known have a kind ofly come received signal by a plurality of branches, and to its diversity receiving technology that synthesizes or select.Here as conventional example, be explained for formation and the action of differential single carrier 4 phase phase modulated (QPSK) signals of having encoded being carried out the delay detection diversity receiver of synthetic diversity reception after the detection.
Fig. 8 be expression such as " IEEE Transactions on VehicularTechnology " the 40th volume, the accompanying drawing that the tradition of record postpones the formation of detection diversity receiver in the paper (" BER Performance of QDPSK With Post detectionDiversity Reception in Mobile Radio Channels ": F.Adachi, K.Ohno) that the Anda of publishing on No. 1 (1991) 237-249 page or leaf etc. is shown.
In Fig. 8,101,102 expression received signals, the received signal before 1 code element of 103,104 expressions, the received signal after the complex weight is multiply by in 105,106 expressions, and 107 expressions divide the signal after assembling, the result of determination of 108 expression received signals.111, the 112nd, make the input signal of each branch postpone the delay circuit of 1 symbol time, 113, the 114th, the complex product musical instruments used in a Buddhist or Taoist mass that complex weight and received signal are multiplied each other, the 115th, the compound adder that the received signal multiply by complex weight in each branch after is synthesized, the 116th, the determinant of signal.
Here, the action to the delay detection diversity receiver of above-mentioned formation is explained.After having imported the received signal 101 of specific branch, delay circuit 111 makes its delay be equivalent to the time of 1 code element, exports the preceding received signal 103 of 1 code element then.Multiply each other by the compound of received signal 103 that complex product musical instruments used in a Buddhist or Taoist mass 113 carries out before received signal 101 and 1 code element, and the received signal (postponing the detection result) 105 after the complex weight is multiply by in output.
On the other hand, imported the received signal 102 with above-mentioned different branch after, delay circuit 112 makes its delay be equivalent to time of 1 code element, exports the received signal 104 before 1 code element then.Multiply each other by the compound of received signal 104 that complex product musical instruments used in a Buddhist or Taoist mass 114 carries out before received signal 102 and 1 code element, and the received signal (postponing the detection result) 106 after the complex weight is multiply by in output.
In compound adder 115, carry out the delay detection result's of two branches compound addition, and the signal 107 after assembling as branch is exported the soft decision data.In determinant 116, the soft decision data are carried out hard decision, and export the hard decision data as the result of determination 108 of received signal.
Like this, in the delay detection diversity receiver by synthetic diversity reception after carrying out detection, the delay detection result of each branch is synthesized, compare, can improve characteristic with the occasion of not carrying out diversity reception.
In receive mode when this external multicarrier transmits, there is a kind of received signal of before detection, back-up being propped up to divide the mode that assembles.Here, as the 2nd kind of conventional art, to multi-carrier modulation with detection before the formation and the action of diversity receiver be explained.
Fig. 9 is that the traditional multi-carrier modulation put down in writing in the 2001-156689 communique accompanying drawing with the formation of diversity receiver before the detection is opened in expression such as the spy.Among Fig. 9,131,132 expression complex weight, the received signal after the complex weight is multiply by in 133,134 expressions, and 135 expressions divide the signal after assembling.121, the 122nd, calculate the compound phase computing cross-correlation portion of compound phase cross-correlation.
Here, to the multi-carrier modulation of above-mentioned formation with detection before the action of diversity receiver be explained.At first, the signal that is received by antenna (101,102) is transmitted to compound phase computing cross-correlation portion (121,122) and complex product musical instruments used in a Buddhist or Taoist mass (113,114) respectively.Calculate complex weight (131,132) by compound phase computing cross-correlation portion (121,122), and its result is outputed to complex product musical instruments used in a Buddhist or Taoist mass (113,114).
Complex product musical instruments used in a Buddhist or Taoist mass (113,114) is handled received signal (101,102) as composite signal, and is that received signal (133,134) outputs to compound adder 115 with the multiplied result of this received signal (101,102) and complex weight (131,132).Signal 135 compound adder 115 assembles both sides' signal sum as branch after outputs to compound phase computing cross-correlation portion (121,122) and follow-up detection section (not shown).
Compound phase computing cross-correlation portion (121,122) makes received signal become leading wave D
iWith delay ripple U
iSum, i.e. D
i+ U
iAnd make the signal conduct of being fed back based on leading wave sum D
oWith delay ripple sum U
oSignal, become D
o+ U
oConsequently, after having got signal that is received and the signal that is fed back relevant, complex weight W
iCan represent by following formula (1).
W
i＝∫(D
iD
o *+U
iU
o *)dt+∫(D
iU
o *+U
iD
o *)dt
...(1)
In the formula, because the 2nd integration in the right relevant less, thereby can consider on probability, to get minimum value.Thereby and D
o+ U
oIn D
oUnder the bigger occasion, just become (2) formula.Otherwise at U
oUnder the bigger occasion, just become (3) formula.
W
i＝∫D
iD
o *dt ...(2)
W
i＝∫U
iU
o *dt ...(3)
Carry out thus assembling, thereby leading wave is enhanced under the occasion of leading wave overall enhanced, under the occasion that postpones the ripple overall enhanced, postpones ripple and be enhanced based on the branch of feedback.
Yet in above-mentioned traditional diversity receiver, divide under the occasion that assembles after in multicarrier transmits, adopting detection, carry out detection after extracting a plurality of carrier waves out by each branch, and then synthesize processing, thereby the number of times of carrier wave extraction and detection just increases.Promptly existing increases the branches that is used to carry out diversity, the problem that the treating capacity in the receiver just increases more more.
Have following problem in addition: promptly, before the detection of multi-carrier modulation, divide to assemble, in mobile communicating from travelling carriage under the occasion of base station transmit signals because transmission line characteristic is different with sending station, thereby it is synthetic to carry out high specific.
Therefore the object of the present invention is to provide and a kind ofly cut down treating capacity and can realize diversity receiver and method of reseptance thereof based on the optimal demodulation characteristic of diversity.
Summary of the invention
The diversity receiver that the diversity receiver that the present invention relates to is used as multicarrier moves, it is characterized in that: have: weight coefficient is calculated the unit, it calculates the weight coefficient of each carrier wave based on phase information and amplitude information between the branch of each carrier wave that obtain from received frame, relevant; Synthesis unit, its before above-mentioned detection, based on above-mentioned weight coefficient, the received signal of synthesizing each branch by each carrier wave.
Below inventing the diversity receiver that relates to is characterised in that: have under the occasion of same transmission line characteristic such as whole carrier waves, above-mentioned weight coefficient is calculated the unit and is calculated the weight coefficient common to whole carrier waves, above-mentioned synthesis unit comes total synthetic whole carrier waves based on above-mentioned common weight coefficient before above-mentioned detection.
Below inventing the diversity receiver that relates to is characterised in that: have under the occasion of same transmission line characteristic such as each a plurality of arbitrarily carrier wave, above-mentioned weight coefficient is calculated the unit will have a plurality of carrier waves of same transmission line characteristic respectively as 1 group, and organize by each and to calculate common weight coefficient, above-mentioned synthesis unit is before above-mentioned detection, based on above-mentioned weight coefficient, organize the received signal of synthesizing each branch by each.
Below the method for reseptance that relates to of invention is characterised in that: comprise that weight coefficient calculates step, phase information and amplitude information between the branch of each carrier wave that be used for obtaining from received frame with diversity receiver based on multicarrier, relevant are calculated the weight coefficient of each carrier wave; Synthesis step is used for before above-mentioned detection, based on above-mentioned weight coefficient, and the received signal of synthesizing each branch by each carrier wave.
Below inventing the method for reseptance that relates to is characterised in that: have under the occasion of same transmission line characteristic at whole carrier waves, calculate step at above-mentioned weight coefficient, calculate the weight coefficient common to whole carrier waves, at above-mentioned synthesis step, before above-mentioned detection, come total synthetic whole carrier waves based on above-mentioned common weight coefficient.
Below inventing the method for reseptance that relates to is characterised in that: have under the occasion of same transmission line characteristic at each a plurality of arbitrarily carrier wave, calculate step at above-mentioned weight coefficient, a plurality of carrier waves that will have same transmission line characteristic are respectively as 1 group, and organize by each and to calculate common weight coefficient, at above-mentioned synthesis step, before above-mentioned detection,, organize the received signal of synthesizing each branch by each based on above-mentioned weight coefficient.
Description of drawings
Fig. 1 is the accompanying drawing of the formation of the diversity receiver execution mode 1 that the present invention relates to of expression,
Fig. 2 is the accompanying drawing of the transmission road model of imagination in the expression execution mode 1,
Fig. 3 is the accompanying drawing that formation one example of device is calculated in the expression weighting,
Fig. 4 is the accompanying drawing of formation one example of expression multicarrier demodulator,
Fig. 5 is the accompanying drawing of the formation of the diversity receiver execution mode 2 that the present invention relates to of expression,
Fig. 6 is the accompanying drawing of the transmission road model of imagination in the expression execution mode 2,
Fig. 7 is the accompanying drawing of the transmission road model of imagination in the expression execution mode 3,
Fig. 8 is the accompanying drawing of traditional diversity receiver one example of expression,
Fig. 9 is the accompanying drawing of traditional diversity receiver one example of expression.
Embodiment
Below based on accompanying drawing, the diversity receiver that the present invention relates to and the execution mode of method of reseptance are elaborated.The present invention is defined in present embodiment in addition.
Execution mode 1
Fig. 1 is the accompanying drawing of the formation of the diversity receiver execution mode 1 that the present invention relates to of expression.In the present embodiment, a kind of occasion that receives 2 carrier signals by 2 branches of imagination.Among Fig. 1, the 1, the 2nd, branch's synthesizer that each carrier wave is used, the 3rd, the multicarrier demodulator, the 4, the 5th, determinant, the 6, the 7th, calculate the weighting of the weight coefficient under the synthesized received signal occasion and calculate device.11,12 represent received signals in addition, the synthetic output of 13,14 expression branches, and 15,16 expression carrier detection results, 17,18 represent the result of determination of received signals, the weight coefficient under 19, the 20 expression synthesized received signal occasions.
Fig. 2 is the accompanying drawing of the transmission road model of imagination in the expression execution mode 1, the 21st, and the base station of reception multi-carrier signal, the 22, the 23rd, travelling carriage.24,25 expressions from mobile radio station 22,23 to the base station 21 transmission signal.
Here, the action (method of reseptance) to the diversity receiver of present embodiment is explained.At first calculate in the device 6,7, utilize the received signal of branch's synthesizer 1 and the received signal of branch's synthesizer 2, calculate the weight coefficient 19,20 of each carrier wave best branch when synthetic in weighting.Here and since mobile radio station 22 and mobile radio station 23 to the base station 21 transmission road different, thereby the weight coefficient 20 that the weight coefficient 19 used of ch1 and ch2 use is different.Therefore calculate the weight coefficient 20 that weight coefficient 19 that ch1 uses and ch2 use respectively separately.
Fig. 3 is the accompanying drawing that formation one example of device 6,7 is calculated in the expression weighting, the 31, the 32nd, and carrier wave extractor displacer, the 33, the 34th, phase/amplitude detector.Here, only the part of transmit frame is carried out demodulation such as training signal (known contrast signal) part, thereby obtain phase information and amplitude information between branch being equipped with carrier wave (ch1, ch2).Calculate from these information and to be used for the received signal of 2 branches is carried out with the weight coefficient that is combined to.
In branch's synthesizer 1,2, (ch1, the ch2) received signal of the weight coefficient of usefulness and each branch are carried out branch and are synthesized to utilize each carrier wave.
In multicarrier demodulator 3, utilize the synthetic output 13,14 of branch to carry out detection and handle.Fig. 4 is the accompanying drawing of formation one example of expression multicarrier demodulator 3, the 41st, and carrier wave extractor displacer, the 42nd, wave detector.In multicarrier demodulator 3, carrier wave extractor displacer 41 is extracted the carrier wave of institute's demodulation out from the synthetic result's (multi-carrier signal) of above-mentioned branch, and 42 pairs of carrier waves of being extracted out of wave detector carry out detection.As extraction method, adopt such as inner local frequencies is carried out compound multiplying each other, and make desirable carrier wave be transferred to base band frequency, then the method for extracting out by low pass filter (LPF) based on carrier wave extractor displacer 41.As demodulation method, adopt in addition, and postpone detection in the next employing of the occasion of differential coding such as synchronous detection based on wave detector 42.
In determinant 4,5, carrier detection result 15,16 is carried out hard decision, and export the hard decision data as the result of determination 17,18 of received signal.
So in the present embodiment, the signal to each branch synthesizes before the multicarrier demodulation.Compare with synthetic mode after the detection like this, can cut down the related treating capacity of demodulation (one of branches gets final product).Owing to constituting under the occasion that arrives via different transmission roads such as each carrier wave, each carrier wave is calculated weight coefficient in addition, thereby can obtain optimal demodulation characteristic based on diversity.
In addition in the present embodiment, the diversity receiver that has carried out 2 branch's receptions for the multi-carrier signal to 2 carrier waves is described, but it is not limited thereto, even received the diversity receiver of the multi-carrier signal of any a plurality of carrier waves, by utilizing a plurality of weightings to calculate device and synthesizer, also can obtain and above-mentioned same effect.Even the diversity receiver of multiple-limb reception is calculated device by utilizing the weighting corresponding with a plurality of branches, and synthesized this a plurality of branches by synthesizer in addition, also can obtain and above-mentioned same effect.
Execution mode 2
Fig. 5 is the accompanying drawing of the formation of the diversity receiver execution mode 2 that the present invention relates to of expression.Present embodiment and above-mentioned same, also being envisioned for is a kind of occasions of 2 carrier signals having been carried out 2 branch's receptions.Among Fig. 5,13a represents the synthetic output of branch.For the formation same with above-mentioned execution mode 1, additional prosign omits its explanation in addition.Here only to being explained with the different action (method of reseptance) of execution mode 1.
Fig. 6 is the accompanying drawing of the transmission road model of imagination in the expression execution mode 2, and 26,27 expressions are the 21 transmission signals to mobile radio station 22,23 from the base station.In the present embodiment, the transmission road characteristic of imagining in a kind of each carrier wave is roughly the same, and be counted as not having frequency selective fading such as " multicarrier transmit in downgoing line ".
Calculate in the device 6 in weighting, utilize the received signal of branch's synthesizer 1 and the received signal of branch's synthesizer 2, the optimum weighting coefficient 19 when coming Branch Computed synthetic.Here, because that the transmission road characteristic of each carrier wave is counted as is roughly the same, thereby signal that can disposable synthetic a plurality of carrier waves.In branch's synthesizer 1, utilize this weight coefficient 19 and received signal 11 and received signal 12, carry out branch and synthesize.Export the synthetic output 13a of branch this moment.
In multicarrier demodulator 3, utilize the synthetic output 13a of branch, carry out detection by each carrier wave and handle.
So in the present embodiment, even under the occasion that branches has increased, if the carrier number that is received does not change, just can carry out correspondence by same multicarrier demodulator.Like this, the treating capacity that can prevent demodulator increases with the increase of branches.
Execution mode 3
Fig. 7 is the accompanying drawing of transmission road model of imagination in the expression execution mode 3,28,29 expressions from mobile radio station 22,23 to the base station 21 transmission signal.In the present embodiment, the transmission road characteristic of a kind of a plurality of carrier waves that receive of imagination is roughly the same, and these a plurality of carrier waves are divided into the occasion of several groups.As an example, sent respectively at 2 mobile radio stations 22,23 under the occasion of 2 carrier signals, the transmission signal of each travelling carriage arrives the base station with roughly the same transmission line characteristic.Under this occasion, can disposablely divide the multi-carrier signal that sends from same travelling carriage to assemble.
Here, the action (method of reseptance) to the diversity receiver of present embodiment is explained.Here only explanation and execution mode 1 and 2 different actions.Such as calculating in the device in the weighting of present embodiment, the carrier wave that will have same transmission line characteristic is as 1 group, and utilizes the received signal of each branch to calculate the best weight coefficient of each group.Like this, utilize the received signal of this weight coefficient and each branch,, come the disposable branch that carries out synthetic by each group by the method same with execution mode 2.
Like this, in the present embodiment, owing to divide into groups, and the weight coefficient when organizing Branch Computed synthetic, thereby can obtain optimal demodulation characteristic based on diversity by each by each signal with same transmission road characteristic.
In addition in the present embodiment, multi-carrier signal with 4 carrier waves is divided into 2 groups of diversity receivers that synthesize to be described, but it is not limited thereto, even received the diversity receiver of the multi-carrier signal of any a plurality of carrier waves, device and synthesizer are calculated in the weighting that is equivalent to organize number by employing, also can obtain and above-mentioned same effect.Even variation has taken place in the carrier number of the multi-carrier signal that receives from travelling carriage in addition, be considered as under the identical occasion in transmission road characteristic a plurality of carrier waves, also can obtain and above-mentioned same effect.
As mentioned above, the present invention constitutes that the signal to each branch synthesizes before the multicarrier demodulation.Thereby have the mode that can obtain synthesizing after a kind of and the detection and compare, can cut down the effect of the diversity receiver of the related treating capacity of demodulation.Constitute in addition under the occasion that arrives via different transmission roads such as each carrier wave, each carrier wave is calculated weight coefficient.Thereby have and to obtain a kind of effect that obtains based on the diversity receiver of the optimal demodulation characteristic of diversity.
According to following invention, even under the occasion that branches has increased, if the carrier number that is received does not change, just can carry out correspondence by same multicarrier demodulator.Thereby has an effect that can obtain the diversity receiver that a kind for the treatment of capacity that prevents demodulator increases with the increase of branches.
Below invention constitutes by each signal with same transmission road characteristic and divides into groups, and the weight coefficient when organizing Branch Computed synthetic by each.Thereby have and to obtain a kind of effect that obtains based on the diversity receiver of the optimal demodulation characteristic of diversity.
According to following invention, the signal to each branch before the multicarrier demodulation synthesizes.Thereby have with the mode of synthesizing after the detection and compare, can cut down the effect of the related treating capacity of demodulation.Under this external occasion that arrives via different transmission roads such as each carrier wave, each carrier wave is calculated weight coefficient.Thereby has an effect that can obtain based on the optimal demodulation characteristic of diversity.
According to following invention, even under the occasion that branches has increased, if the carrier number that is received does not change, just can carry out correspondence by same multicarrier demodulator.Thereby has an effect that the treating capacity that can prevent demodulator increases with the increase of branches.
According to following invention, divide into groups by each signal with same transmission road characteristic, and the weight coefficient when organizing Branch Computed synthetic by each.Thereby has an effect that can obtain based on the optimal demodulation characteristic of diversity.
Utilizability on the industry
As mentioned above, diversity receiver that the present invention relates to and method of reseptance, be applicable to digital wireless communication equipment such as digital mobile body communication, digital communication by satellite, the satellite communication of digital mobile body, the receiver that is particularly useful for having the possibility of under fading environment, using.
Claims (8)
1. a diversity receiver is the diversity receiver that multicarrier is used, and it is characterized in that: have
Weight coefficient is calculated the unit, and it calculates the weight coefficient of each carrier wave based on phase information and amplitude information between the branch of each carrier wave that obtain from received frame, relevant;
Synthesis unit, its before above-mentioned detection, based on above-mentioned weight coefficient, the received signal of synthesizing each branch by each carrier wave.
In the claim 1 record diversity receiver, it is characterized in that:
Have under the occasion of same transmission line characteristic at whole carrier waves,
Above-mentioned weight coefficient is calculated the unit and is calculated the weight coefficient common to whole carrier waves,
Above-mentioned synthesis unit comes total synthetic whole carrier waves based on above-mentioned common weight coefficient before above-mentioned detection.
In the claim 1 record diversity receiver, it is characterized in that:
Have under the occasion of same transmission line characteristic at each a plurality of arbitrarily carrier wave,
Above-mentioned weight coefficient is calculated a plurality of carrier waves that the unit will have same transmission line characteristic respectively as 1 group, and organizes by each and to calculate common weight coefficient,
Above-mentioned synthesis unit based on above-mentioned weight coefficient, is organized the received signal of synthesizing each branch by each before above-mentioned detection.
In the claim 2 record diversity receiver, it is characterized in that:
Have under the occasion of same transmission line characteristic at each a plurality of arbitrarily carrier wave,
Above-mentioned weight coefficient is calculated a plurality of carrier waves that the unit will have same transmission line characteristic respectively as 1 group, and organizes by each and to calculate common weight coefficient,
Above-mentioned synthesis unit based on above-mentioned weight coefficient, is organized the received signal of synthesizing each branch by each before above-mentioned detection.
5. a method of reseptance is the method for reseptance of multicarrier with diversity receiver, it is characterized in that: comprise
Weight coefficient is calculated step, is used for calculating the weight coefficient of each carrier wave based on phase information and amplitude information between the branch of each carrier wave that obtain from received frame, relevant;
Synthesis step is used for before above-mentioned detection, based on above-mentioned weight coefficient, and the received signal of synthesizing each branch by each carrier wave.
In the claim 5 record method of reseptance, it is characterized in that:
Have under the occasion of same transmission line characteristic at whole carrier waves,
Calculate step at above-mentioned weight coefficient, calculate the weight coefficient common whole carrier waves,
At above-mentioned synthesis step, before above-mentioned detection, come total synthetic whole carrier waves based on above-mentioned common weight coefficient.
In the claim 5 record method of reseptance, it is characterized in that:
Have under the occasion of same transmission line characteristic at each a plurality of arbitrarily carrier wave,
Calculate step at above-mentioned weight coefficient, a plurality of carrier waves that will have same transmission line characteristic are respectively as 1 group, and organize by each and to calculate common weight coefficient,
At above-mentioned synthesis step, before above-mentioned detection,, organize the received signal of synthesizing each branch by each based on above-mentioned weight coefficient.
In the claim 6 record method of reseptance, it is characterized in that:
Have under the occasion of same transmission line characteristic at each a plurality of arbitrarily carrier wave,
Calculate step at above-mentioned weight coefficient, a plurality of carrier waves that will have same transmission line characteristic are respectively as 1 group, and organize by each and to calculate common weight coefficient,
At above-mentioned synthesis step, before above-mentioned detection,, organize the received signal of synthesizing each branch by each based on above-mentioned weight coefficient.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP144873/2002 | 2002-05-20 | ||
| JP2002144873A JP4118599B2 (en) | 2002-05-20 | 2002-05-20 | Diversity receiver and receiving method |
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| Publication Number | Publication Date |
|---|---|
| CN1653722A true CN1653722A (en) | 2005-08-10 |
Family
ID=29545064
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA03811349XA Pending CN1653722A (en) | 2002-05-20 | 2003-05-02 | Diversity receiver and receiving method |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7167695B2 (en) |
| EP (1) | EP1507339A1 (en) |
| JP (1) | JP4118599B2 (en) |
| CN (1) | CN1653722A (en) |
| WO (1) | WO2003098838A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841508A (en) * | 2009-03-12 | 2010-09-22 | 阿尔卑斯电气株式会社 | Diversity receiver |
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| US7324794B2 (en) * | 2004-09-29 | 2008-01-29 | Tzero Technologies, Inc. | Phase combining diversity |
| JP4541199B2 (en) * | 2005-03-18 | 2010-09-08 | 三菱電機株式会社 | Receiver |
| KR100970519B1 (en) * | 2005-06-29 | 2010-07-16 | 교세라 가부시키가이샤 | Radio communication device, radio communication method, and computer-readable recording meduim recored radio communication program |
| US7468514B1 (en) | 2007-06-15 | 2008-12-23 | Hamamatsu Photonics K.K. | Radiation image conversion panel, scintillator panel, and radiation image sensor |
| ES2617029T3 (en) * | 2009-08-03 | 2017-06-15 | Global Eagle Entertainment Inc | System and method to enable an ultra-small aperture communications antenna using spectral replication and consistent frequency and phase combination |
| US8340574B2 (en) | 2009-08-14 | 2012-12-25 | Emc Satcom Technologies, Llc | System and method for enabling ultra small aperture communication antenna using spectral replication and coherent frequency and phase combining |
| US8285203B2 (en) * | 2009-08-14 | 2012-10-09 | Emc Satcom Technologies, Llc | System and method for enabling ultra small aperture communication antenna using spectral replication and coherent frequency and phase combining |
| CN103250359A (en) * | 2010-12-03 | 2013-08-14 | 日本电气株式会社 | Wireless communication device |
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2002
- 2002-05-20 JP JP2002144873A patent/JP4118599B2/en not_active Expired - Fee Related
-
2003
- 2003-05-02 WO PCT/JP2003/005625 patent/WO2003098838A1/en active Application Filing
- 2003-05-02 US US10/486,392 patent/US7167695B2/en not_active Expired - Fee Related
- 2003-05-02 CN CNA03811349XA patent/CN1653722A/en active Pending
- 2003-05-02 EP EP03725744A patent/EP1507339A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841508A (en) * | 2009-03-12 | 2010-09-22 | 阿尔卑斯电气株式会社 | Diversity receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003098838A1 (en) | 2003-11-27 |
| US20040242173A1 (en) | 2004-12-02 |
| JP2003338782A (en) | 2003-11-28 |
| EP1507339A1 (en) | 2005-02-16 |
| JP4118599B2 (en) | 2008-07-16 |
| US7167695B2 (en) | 2007-01-23 |
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